I'm a twice-the-length-of-the-relationship woman, if it was something serious. I haven't had any non-serious relationships, though, so who knows if it would take less time!
But yeah, my longest relationship before my current one was for a year, and it took me 2+ years to get over that. I was single for four years after that break-up... so even after I got over it, I was still not ready to be vulnerable again for a long time. (I was thoroughly committed to not rebounding because I wanted to heal properly.)
Oh, I guess one time I had a crush, crush didn't work out, and I got over it in less than a day. It helps that the guy wasn't sure if he was straight or not (and chose that moment to tell me, when I was telling him I liked him). I think I was GLAD to get over that one quickly!